Its a cult and cult dynamics mean that once in you begin to believe the lie and live the lie. You become so obsessed with gaining approval from the cult that rational thinking is suspended. You look at those at the top, they fall into hard liners who want to preserve the status quo and nice people who lack the ability to influence but stay at the top thinking they can make a difference. This is a high control group. Money and status is a draw after all you can't be much higher then prospective king with Jesus. They are treated like lords, live well and get to play with millions of peoples lives every day. Most people don't get that kind of power trip.
It's a world within a world each member conditioned over years of indoctrination with the added control element of DFing and shunning. People genuinely believe what they are taught and are kept busy with study, service, meeting attendance and literature so they are never doing enough and constantly are striving to do better. You become so focused to gaining approval within the group few people look around and take time to check what they are learning.
The best thing about being in a cult is that members will deny they are in one they cannot see it.